Air Quality Lab — Flagstaff, United States
Air Quality Profile·
Flagstaff reports an annual PM2.5 of 4.8 µg/m³. That's below the WHO 2021 annual guideline of 5 µg/m³ — cleaner than most cities on the continent.
Flagstaff
United States
United StatesAnnual Average
ExcellentWHO annual classification
4.8µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
3.83.8 µg/m³ — Excellent
4.34.3 µg/m³ — Excellent
4.74.7 µg/m³ — Excellent
4.74.7 µg/m³ — Excellent
4.44.4 µg/m³ — Excellent
6.46.4 µg/m³ — Good
5.65.6 µg/m³ — Good
5.35.3 µg/m³ — Good
5.15.1 µg/m³ — Good
3.13.1 µg/m³ — Excellent
4.64.6 µg/m³ — Excellent
5.05.0 µg/m³ — Excellent
Jan
Feb
Mar
Apr
May
Jun
3.83.8 µg/m³ — Excellent
4.34.3 µg/m³ — Excellent
4.74.7 µg/m³ — Excellent
4.74.7 µg/m³ — Excellent
4.44.4 µg/m³ — Excellent
6.46.4 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
5.65.6 µg/m³ — Good
5.35.3 µg/m³ — Good
5.15.1 µg/m³ — Good
3.13.1 µg/m³ — Excellent
4.64.6 µg/m³ — Excellent
5.05.0 µg/m³ — Excellent
Best months: Jan–Feb, OctWorst months: Jun–Aug
Excellent0–5 µg/m³Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across United States
Flagstaff: 4.8 µg/m³. Typical range in United States: 6.4–7.8 µg/m³. Low anchor: Anchorage, 4.3 µg/m³. High anchor: Los Angeles, 13.8 µg/m³.
2,121 cities tracked